JP3505945B2 - Forming method for two-tone interior skin - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a two-tone interior material skin, and more particularly to a method for forming a two-tone interior material skin by powder slush molding. 2. Description of the Related Art Conventionally, as a method of forming an interior material skin of an automobile, for example, an instrument panel skin, a method of forming a two-tone instrument panel skin using powder of a different color is known. . [0003] As a conventional method of forming a two-tone instrument panel skin, as shown in FIG.
In a state in which the parting part 102 in the mold 100 is sealed with the partition plate 104, the first powder 106 is put into one of the divided molds 100A, and powder slush molding is performed.
As shown in FIG. 7 (B), a method is known in which a partition plate is removed, the second powder 108 is charged into the mold interior 100A and the mold interior 100B, and powder slush molding is performed. [0004] Further, as shown in FIG.
In a state in which the parting part 102 inside the mold 0 is sealed with the partition plate 104, the first powder 106 is put into the inside 100A of one of the divided molds, and the inside 10 of the other mold is divided.
8B, the second powder 108 is charged, and these are molded at the same time. Then, as shown in FIG. 8 (B), the partition plate is removed, and the parting part 102 is made of a resin composed of the first powder 106 and the second powder. There is also known a method of filling with resin made of No. 108 (Japanese Patent Application Laid-Open No. 6-199201). However, in the former molding method, since the second powder covers the first powder, a part of the second powder is wasted and the first powder is wasted.
Since the two molding steps of the molding step using the powder and the molding step using the second powder are performed, the molding time becomes long. [0006] In the latter molding method, the first powder and the second powder are liable to be mixed in color at the parting-off portion. SUMMARY OF THE INVENTION In view of the above-mentioned facts, it is an object of the present invention to provide a method for forming a two-tone interior skin material capable of eliminating powder waste, eliminating color mixing, and improving productivity. According to a first aspect of the present invention, there is provided a method for forming a two-tone color interior material skin according to the present invention, wherein a two-tone color skin is provided at the tip of a parting projection of a skin forming electroforming mold . Parting-off
And a two-tone skin on the parting-off part
A sealing material setting step of setting a sealing material having a U-shaped cross section to be connected to each other, and pressing a partition plate against the sealing material to apply a powder of a different color to each part of the skin molding electroforming mold partitioned by the partition plate. And a molding step of simultaneously performing powder slush molding. Therefore, the parting-off portion of the two-tone skin is formed.
And a two-tone skin on the parting-off
Seal material with a U-shaped cross section that is connected to each other for skin formation
Since this is set at the tip of the parting protrusion of the electroforming mold, color mixing can be eliminated by this seal material. Also, in a single powder shlush molding process, the two-tone interior material skin can be integrally molded with a different color powder,
Eliminate powder waste and increase productivity. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the two-tone color interior material skin of the present invention will be described in detail with reference to FIGS. In FIGS. 4 and 5, an arrow FR indicates a forward direction of the vehicle, and an arrow UP indicates an upward direction of the vehicle. As shown in FIG. 4, an instrument panel skin 10 as an interior material skin of the present embodiment has a two-tone color, and has an upper skin 14 which is above a parting portion 12 extending in the horizontal direction. The lower skin 16, which is the lower side of the parting part 12, is made of a different color resin material. As shown in FIG. 5, the instrument panel skin 10 is bent into a U-shaped cross section at the parting part 12, and the bottom of the parting part 12 has a U-shaped cross section as a sealing material made of an elastic material. A seal rubber 18 is provided. That is, the upper skin 14 and the lower skin 16 are
The parting-off part 12 is connected via a seal rubber 18. Next, a method of forming the two-tone instrument panel skin of the present embodiment will be described. As shown in FIG. 3, in the molding method according to the present embodiment, first, a tip of a parting projection 22 for forming a parting part, which is formed on the skin mold 20, has a U-shaped cross section. The band-shaped seal rubber 18 thus set is set (seal material setting step). Next, as shown in FIG. 2, a partition plate 24 formed in the powder box is pressed against the tip 18A of the seal rubber 18. At this time, a seal 26 made of an elastic material such as rubber is
8, is fixed by a fixing member such as a nut 30;
The seal 26 comes into close contact with the seal rubber 18. As shown in FIG. 1, in the powder box 32, powders 34 and 36 of different colors are put in portions partitioned by the partition plate 24, respectively. For this reason, powders 34 and 36 of different colors can be put into the respective parts 38 and 40 in the skin molding electroforming mold 20 divided by the partition plate 24, the seal 26, the seal rubber 18, and the parting projections 22, In this state, they are simultaneously subjected to powder slush molding (molding step). The outer peripheral edge 3 of the powder box 32
A seal 26 is also fixed to 2A by a fixing member such as a bolt or a nut, and the seal 26 is in close contact with a seal surface 20A formed on the outer peripheral edge of the skin mold 20. As described above, in the method for forming the two-tone color interior material skin of the present embodiment, the instrument panel skin 1
Since the parting portion 12 of the two-tone color of 0 is formed of the sealing rubber 18, the mixing of the powders 34 and 36 of different colors can be eliminated by the sealing rubber 18. Further, the two-tone instrument panel skin 10 can be integrally formed by the powders 34 and 36 of different colors in a single powder shlush forming step.
Eliminate powder waste and increase productivity. Further, by using the seal rubber 18 having a U-shaped cross section, the groove of the parting-off portion 12 can be deepened, so that the appearance quality is improved. In the above, the present invention has been described in detail with respect to a specific embodiment. However, the present invention is not limited to such an embodiment, and various other embodiments are included in the scope of the present invention. It is clear to a person skilled in the art that is possible. For example, in the present embodiment, the present invention is applied to an instrument panel skin as an interior material skin, but the present invention is also applicable to other interior material skins such as a door trim skin. In the present embodiment, the seal rubber 18 is used as the seal material. However, the seal material is not limited to rubber, and may be another elastic body such as a sponge as long as it is in close contact with the partition plate 24. Also, a seal 2 fixed to the tip of the partition plate 24
6 may be removed. Further, as shown in FIG. 6 (A), by making the cross-sectional shape of the end face of the seal rubber 18 into a sawtooth shape, the bonding strength of the bonding surface with the upper skin 14 and the lower skin 16 is increased by the anchor effect. The seal rubber 18 may be prevented from coming off. Further, as shown in FIG. 6 (B), an inclined surface is formed inside the U-shape of the seal rubber 18 and the joint surface is enlarged to increase the joint strength of the joint surface with the upper skin 14 and the lower skin 16. Alternatively, the sealing rubber 18 may be prevented from coming off. Further, as shown in FIG. 6 (C), an inclined surface is formed on the outer side of the U-shape of the seal rubber 18 to enlarge the joint surface, thereby increasing the joint strength of the joint surface with the upper skin 14 and the lower skin 16. Alternatively, the sealing rubber 18 may be prevented from coming off. Further, as shown in FIG. 6 (D), by forming the cross-sectional shape of the end face of the seal rubber 18 into a flask shape, the bonding strength of the bonding surface with the upper skin 14 and the lower skin 16 is increased by the anchor effect, and the sealing rubber 18 Detachment may be prevented. According to the first aspect of the present invention, there is provided a method for forming a two-tone color interior material skin according to the present invention, wherein a two-tone color skin parting portion is provided at a tip of a parting projection of a skin molding electroforming mold. Then
Seal material setting step of setting a seal material having a U-shaped cross section to connect the two-tone color skins to each other at a parting portion, and forming a skin partitioned by the partition plate by pressing the partition plate against the seal material Including a molding process in which powders of different colors are injected into each part of the electroforming mold and simultaneously forming powder slush, it is possible to eliminate waste of powder, eliminate color mixing, and improve productivity. Having. In addition, the groove of the parting part can be deepened, which has an excellent effect of improving appearance quality.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic sectional side view showing a forming step of a method for forming a two-tone interior material skin according to an embodiment of the present invention. FIG. 2 is an enlarged side sectional view showing a molding step of a method for molding a two-tone interior material skin according to an embodiment of the present invention. FIG. 3 is an enlarged perspective view showing a sealing material setting step of the method for forming a two-tone interior material skin according to one embodiment of the present invention. FIG. 4 is a perspective view showing a two-tone color interior material skin according to an embodiment of the present invention. FIG. 5 is an enlarged sectional view taken along line 5-5 in FIG. 6 (A) to 6 (D) are enlarged sectional views corresponding to FIG. 5 according to another embodiment of the present invention. FIGS. 7A and 7B are schematic side sectional views showing a method for forming a two-tone interior material skin according to a conventional embodiment. 8A and 8B are schematic side sectional views illustrating a method for forming a two-tone color interior material skin according to another conventional embodiment. [Description of Signs] 10 Instrument panel skin (interior material skin) 12 Parting part 14 Upper skin 16 Lower skin 18 Seal rubber (seal material) 20 Skin mold electroforming mold 22 Parting projection 24 Partition plate 32 Powder box 34 Powder 36 Powder

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B29C 41/18 B29C 41/22

Claims (1)

(57) [Claim 1] A two-tone skin parting part is formed at the tip of the parting projection of the skin molding electroforming mold, and the two-tone part.
A sealing material setting step of setting a U-shaped sealing material for connecting the skins of the same color at the parting portion, and a partition plate pressed against the sealing material to be partitioned by the partition plate. A method of forming a two-tone color interior material skin, comprising: charging a powder of a different color to each part of the electroforming mold and simultaneously forming a powder slush.